1 /*
2 * Copyright (C) 2006 Apple Computer, Inc. All rights reserved.
3 * Copyright (C) 2007-2008 Torch Mobile, Inc.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #include "config.h"
28 #include "SharedTimer.h"
29
30 #include "Page.h"
31 #include "SystemTime.h"
32 #include "Widget.h"
33 #include <wtf/Assertions.h>
34 #include <wtf/CurrentTime.h>
35 #include <windows.h>
36
37 namespace JSC {
38 extern void* g_stackBase;
39 }
40
41 namespace WebCore {
42
43 enum {
44 TimerIdNone = 0,
45 TimerIdAuto,
46 TimerIdManual,
47 };
48 static UINT timerID = TimerIdNone;
49
50 static void (*sharedTimerFiredFunction)();
51
52 static HWND timerWindowHandle = 0;
53 const LPCWSTR kTimerWindowClassName = L"TimerWindowClass";
54
TimerWindowWndProc(HWND hWnd,UINT message,WPARAM wParam,LPARAM lParam)55 LRESULT CALLBACK TimerWindowWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
56 {
57 int dummy;
58 JSC::g_stackBase = &dummy;
59
60 if (message == WM_TIMER) {
61 if (timerID != TimerIdNone)
62 sharedTimerFiredFunction();
63 } else if (message == WM_USER) {
64 if (timerID = TimerIdManual) {
65 sharedTimerFiredFunction();
66 PostMessage(hWnd, WM_USER, 0, 0);
67 }
68 } else {
69 JSC::g_stackBase = 0;
70 return DefWindowProc(hWnd, message, wParam, lParam);
71 }
72 JSC::g_stackBase = 0;
73 return 0;
74 }
75
initializeOffScreenTimerWindow()76 static void initializeOffScreenTimerWindow()
77 {
78 if (timerWindowHandle)
79 return;
80
81 WNDCLASS wcex = {0};
82 wcex.lpfnWndProc = TimerWindowWndProc;
83 wcex.hInstance = Page::instanceHandle();
84 wcex.lpszClassName = kTimerWindowClassName;
85 RegisterClass(&wcex);
86
87 timerWindowHandle = CreateWindow(kTimerWindowClassName, 0, 0,
88 CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, 0, 0, Page::instanceHandle(), 0);
89 }
90
setSharedTimerFiredFunction(void (* f)())91 void setSharedTimerFiredFunction(void (*f)())
92 {
93 sharedTimerFiredFunction = f;
94 }
95
96 #define USER_TIMER_MAXIMUM 0x7FFFFFFF
97 #define USER_TIMER_MINIMUM 0x0000000A
98
setSharedTimerFireTime(double fireTime)99 void setSharedTimerFireTime(double fireTime)
100 {
101 ASSERT(sharedTimerFiredFunction);
102
103 double interval = (fireTime - currentTime()) * 1000.;
104 unsigned intervalInMS = interval < USER_TIMER_MINIMUM
105 ? USER_TIMER_MINIMUM
106 : interval > USER_TIMER_MAXIMUM
107 ? USER_TIMER_MAXIMUM
108 : static_cast<unsigned>(interval);
109
110 if (timerID == TimerIdAuto) {
111 KillTimer(timerWindowHandle, TimerIdAuto);
112 timerID = TimerIdNone;
113 }
114
115 initializeOffScreenTimerWindow();
116 if (SetTimer(timerWindowHandle, TimerIdAuto, intervalInMS, 0))
117 timerID = TimerIdAuto;
118 else if (timerID != TimerIdManual)
119 PostMessage(timerWindowHandle, WM_USER, 0, 0);
120 }
121
stopSharedTimer()122 void stopSharedTimer()
123 {
124 if (timerID == TimerIdAuto)
125 KillTimer(timerWindowHandle, TimerIdAuto);
126
127 timerID = TimerIdNone;
128 }
129
130 }
131